Magnet 1
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Magnets are made of iron, nickel, cobalt, or steel. To preserve a bar magnet, you should store it with another magnet pointing in the opposite direction to maintain its magnetic field. When a magnet breaks, its magnetic field also breaks into smaller magnetic fields. An electromagnet generates a magnetic field through a coil of wire when electric current passes through; placing an iron core in the coil makes the magnetic field stronger. Materials like iron, nickel, and cobalt are magnetic, while materials like aluminum, copper, glass, plastic, wood, and silver are non-magnetic.
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Understand the Magnetic properties of the materials, types of magnets & types of magnetic materials and the properties and applications of materials.
Andy kemagnetan(presntasi)
This document discusses the origins and types of magnets. There are two types of magnets - natural magnets and artificial magnets. Artificial magnets include hard magnets, which are strong and permanent, and soft magnets, which are weak and transient. Hard magnets are made of steel and examples include cassettes and compasses, while soft magnets are made of soft iron. The magnetic field is the region around a magnet that is still influenced by its magnetic force. Materials can be classified as ferromagnetic, paramagnetic, or diamagnetic based on their interaction with magnetism. A magnet has magnetic poles (north and south) located at its ends, connected by a magnetic axis.
Types_of_Magnets[1].ppt
There are three main types of magnets: permanent magnets, temporary magnets, and electromagnets. Permanent magnets retain magnetism, temporary magnets only act as magnets in magnetic fields, and electromagnets can be adjusted by changing current. There are also four classes of permanent magnets: neodymium iron boron, samarium cobalt, alnico, and ceramic/ferrite. Neodymium iron boron and samarium cobalt are strongest but most difficult to demagnetize, while alnico is least affected by temperature but easiest to demagnetize. Ceramic magnets are very popular and moderately strong and resistant to demagnetization.
Magnetism and electromagnetism
This document provides information about magnetism and electromagnetism. It discusses the poles of magnets, magnetic materials like iron, induced magnetism through magnetic induction, and how electromagnets can be created using coils of wire and electric current. Examples of applications that use electromagnets are also described, such as electric bells and circuit breakers. Magnetic fields and field lines are explained, including how they are produced by currents and plotted using compasses.
Role of Magnets
Magnets are objects that produce magnetic fields and attract iron objects. There are different types of magnets including permanent magnets, temporary magnets, and electromagnets. Magnets have many important uses in technology, medicine, science, music, art, toys, jewelry, and transportation. They are crucial components of devices like speakers, computers, motors, and medical imaging machines. Magnets also have applications in areas like art, toys, scrap sorting, and magnetic levitation transportation. The student learned that magnets play a much more significant role in daily life than previously realized.
Magnetism
Magnets have north and south poles and attract magnetic materials like iron. A magnet can induce magnetism in other magnetic materials through magnetic induction. The magnetic domains within materials align to create their magnetic properties, and heating, hammering, or alternating currents can demagnetize materials by disrupting this alignment. Magnets can be made by stroking an object with a magnet or by running a direct current through a solenoid wrapped around the object.
What is magnet.pdf
Magnets work by generating magnetic fields through the motion of electrons within their atoms. The magnetic field is strongest at the poles of the magnet and opposite poles attract while like poles repel. There are two main types of magnets - permanent magnets made from materials with natural magnetic fields like iron, and electromagnets which use electric currents to magnetize otherwise non-magnetic materials like copper or steel. Magnets are used in many applications including compasses, speakers, motors, generators, MRI machines, hard drives, and toys.
Power point magnetic force firman gilbert metta
The document discusses concepts related to magnets including:
- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
Power point magnetic force firman gilbert metta
The document discusses concepts related to magnets including:
- Metals like iron, nickel, and cobalt have strong magnetic properties. Steel contains iron and carbon, while stainless steel contains chromium and nickel to prevent rusting.
- Magnets are made of materials that can attract or repel each other, with most magnets made of steel or mixtures like alnico containing aluminum, nickel, and cobalt.
- There are three main types of magnets: horseshoe, rod, and bar magnets, which have different magnetic force strengths. Magnets have north and south poles that attract or repel depending on their orientation.
- Magnetic fields can be observed using iron filings or a compass, with the strongest force
Interactive textbook ch. 18 sec 1 magnets & magnetism
Magnets have two poles, north and south, and exert magnetic forces on each other and other objects. Earth itself acts like a giant magnet, with its magnetic north pole located near its geographic south pole. Materials are magnetic if their atomic domains are aligned, allowing their magnetic fields to combine. There are different types of magnets including permanent and electromagnets. Earth's rotation creates electric currents in its liquid outer core, generating the planet's magnetic field.
Magnets
Magnets are objects that produce magnetic fields and are made of ferromagnetic materials like iron, nickel, and cobalt. A permanent magnet is an object made from materials that are magnetized and create their own persistent magnetic field, such as those used in refrigerator magnets. Ferromagnetic materials can be either soft and easily magnetized but not retain magnetism, or hard and strongly magnetized to remain permanently magnetic. Electromagnets also produce magnetic fields when electric current passes through coils wound around a ferromagnetic core.
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Selina concise physics solutions class 6 chapter 6 magnetism
Selina concise physics solutions class 6 chapter 6 magnetism
Magnetic Materials, Properties of magnetic materials and it's application
Magnetic Materials, Properties of magnetic materials and it's application
Interactive textbook ch. 18 sec 1 magnets & magnetism
Interactive textbook ch. 18 sec 1 magnets & magnetism
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Ch.10.acids and alkalis (3rd week)..
1) Acids and alkalis undergo a neutralization reaction where an acid reacts with an alkali to form a salt and water.
2) Common examples of neutralization include reactions between acids like hydrochloric acid, sulfuric acid, and nitric acid with alkalis like sodium hydroxide and potassium hydroxide.
3) Neutralization reactions have many applications including relieving insect stings, curing indigestion, baking cakes, putting out fires, and improving poor soil quality affected by acid rain.
Thermal energy
Thermal energy is the energy of moving particles that makes up heat. Heat is the transfer of thermal energy between objects when they are at different temperatures. Temperature measures the amount of thermal energy in an object, with higher temperatures indicating more thermal energy. Thermometers measure temperature using liquids that expand when heated, allowing the user to read the temperature in degrees. Thermal conductors easily allow the transfer of heat, like metals, while insulators do not, like plastics and wood. Common materials are identified as conductors or insulators based on their ability to transfer thermal energy.
Ch.10.acids and alkalis (2).
Robert Boyle discovered that red cabbage juice and violets could be used as acid-base indicators. Red cabbage juice turns red in acids and green in alkalis, while violets turn purple in acids and greenish-yellow in alkalis. He also found that the juice from lichen (litmus) changed color between acids and alkalis and could be used on paper strips. This led to the development of the pH scale to quantify the strength of acids and alkalis from 0-14 based on their hydrogen ion concentration. Common pH indicators like methyl orange and phenolphthalein change color over different ranges on the pH scale to indicate whether a solution is acidic, basic, or neutral.
Ch.10. acids and alkalis (1).
This document discusses acids and alkalis. It notes that ancient Egyptians and Greeks observed that some substances taste sour while others feel slippery. Scientists later named sour substances "acids" and slippery substances "alkalis." Examples of acids found in nature include citric acid in oranges and lactic acid in muscles. Vinegar contains ethanoic acid. Acids can be classified as organic, produced by living things, or mineral. Common alkalis include sodium hydroxide, calcium hydroxide, and limewater. Concentrated solutions of acids and alkalis are corrosive, while dilute solutions are irritants. Alkalis are found in household cleaners and react with skin fat to produce soap-like substances.
Acids and alkalis 3
This document discusses neutralization reactions between acids and bases. It provides examples of common acids like hydrochloric, sulfuric, and nitric acid reacting with bases like sodium hydroxide and potassium hydroxide to form salts and water. Additional examples are given for using neutralization reactions to cure bee stings, treat indigestion, make baking powder rise in cakes, improve acidic soil for crop growth, and reduce the effects of acid rain by neutralizing it. The document also covers how neutralization can be used to clean teeth and dissolve mineral scales from kettles.
Acids and alkalis 2
Litmus is used to detect acids and alkalis. It can be used as a solution or absorbed into paper strips. Litmus solution turns red in acid and blue in alkali, while litmus paper turns red in acid and blue in alkali. The pH scale measures acidity and alkalinity from 0 to 14, with 0 being the strongest acid and 14 the strongest alkali. pH levels between 0-2 are strong acids, 3-6 are weak acids, 7 is neutral, 8-11 are weak alkalis, and 12-14 are strong alkalis.
Acids and alkalis 1
This document discusses acids and alkalis found in daily life. It notes that while some acids are corrosive, others like citric acid are found in foods and give them their sour taste. Examples of acids in living things include citric acid in oranges and lemons, ascorbic acid in fruits, lactic acid in muscles, and uric acid in urine. Vinegar contains ethanoic acid, also known as acetic acid, which is produced when oxygen reacts with ethanol in wine over time. Acids can be classified as organic acids produced by living things or mineral acids not produced by living things. While concentrated acids and alkalis are corrosive, dilute solutions are safer to handle.
Thermal energy ppt 1
Thermal energy is the energy of moving particles that causes heat. Heat is the transfer of thermal energy between objects when they are at different temperatures. The document discusses conductors and insulators - materials that easily allow heat to pass through them are conductors like metals and materials that do not are insulators like rubber. It provides examples of common objects and whether they are thermal conductors or insulators.
Heat story
The saucepan was being stirred by a wooden spoon while heating gravy. The hood suggested using a metal spoon instead, but the wooden spoon argued it would not catch fire unless put in the gas flame. The saucepan, with a wooden handle, and kettle, with a plastic handle, agreed their materials keep the heat from reaching what they are holding. The window explained it does not let cold in but instead keeps the heat in the kitchen from escaping, which would result in it feeling cold without this function.
forces Presentation 2
Water exerts two main forces - upthrust force and water resistance. Upthrust force causes objects to float and is felt when holding down a floating object underwater. Water resistance is felt when walking or swimming through water, as water pushes back against movement. Air resistance also impacts moving objects, slowing them down depending on size, and can be useful for parachutes which use air resistance to slow falling.
forces Presentation 1
Forces cause objects to move, change direction, or stop moving. Unbalanced forces cause motion while balanced forces do not. Friction is a type of force that opposes motion between two surfaces and causes moving objects to slow down and stop. The more mass an object has, the greater its weight due to gravity.
Rock uses
This document discusses the uses of four different types of rocks: slate, granite, chalk, and marble. Slate is used for roofing tiles and billiard tables because it is hard, impermeable, and slips easily into thin sheets. Granite is used for steps, roads, buildings, and schools because it is hard and impermeable and doesn't wear away easily. Chalk is used for writing on blackboards because it is formed from sea creatures and wears away easily. Marble is used for floor and wall tiles and statues because it has attractive texture and color and can be cut and polished.
Types of soil
Soils are mixtures of bits of rocks, dead plants and animals, air and water that support plant growth. Different soil types like sand, silt and clay are distinguished by the size of their particles and how much air and water they hold. Sand drains easily while clay drains poorly, meaning different soil types support different plants.
Light energy
1. Light is a small part of the electromagnetic spectrum and can travel through a vacuum without a medium, unlike sound waves.
2. Light travels in transverse waves and when it hits objects can be absorbed, reflected, or pass through.
3. The major natural light source is the sun, while other sources can be natural or man-made. Objects like the moon and water reflect rather than generate light.
Types of soil
Soils are mixtures of bits of rocks, dead plants and animals, air and water that support plant growth. Different soil types contain particles of different sizes that impact drainage and which plants can grow best. Sand soil has large particles and drains easily while clay soil has tiny particles, few air gaps, and does not drain easily.
Minerals and rocks
The document discusses the three main types of rocks: igneous, sedimentary, and metamorphic. Igneous rocks form when magma or lava cools and hardens. Sedimentary rocks form through the compaction and cementation of sediments. Metamorphic rocks form when existing rocks are changed by heat, pressure, and chemical reactions deep underground. The rock cycle shows how the three rock types are interrelated as one rock type transforms into another over time.
Ch.11.less.1.how are forces and motion related?
1) The document discusses different types of motion including up and down, straight line, round and round, zigzag, and back and forth motion. It also discusses distance, direction, forces, and types of forces including balanced and unbalanced forces.
2) Forces can make something move, change an object's direction or speed, or change an object's shape. Examples of forces include gravity, friction, and air resistance.
3) Balanced forces do not change an object's motion, while unbalanced forces can make an object start or stop moving or change directions.
Light gb
Light comes primarily from the sun. It can also come from other natural sources like the moon or man-made sources like lamps. The moon and mirrors do not produce their own light but reflect light from other sources.
Light travels in straight lines and can pass through transparent materials, pass through translucent materials partially, or be blocked by opaque materials. The way light interacts with objects determines whether they appear colored or form shadows. Reflection and refraction explain how light bends when moving between different materials like air and water.
Ch.12.less.2.what are the properties of sound [autosaved] [recovered]
The document discusses key properties of sound including that it is a type of energy that moves through matter as longitudinal waves of vibrations called sound waves. It moves through three parts of the ear - outer, middle, and inner - and can be reflected as echoes. The pitch and frequency of sounds are related, though pitch is how our ears perceive it, and volume refers to the density of compressions and rarefactions in the air. Materials like wall padding and foam can absorb sound waves to reduce echoes and noise.
Changes in state
Water can exist in three states of matter: as a solid (ice), a liquid (water), and a gas (water vapor). Ice melts into water and water evaporates into vapor through boiling or evaporation; vapor condenses back into liquid water through condensation and liquid water freezes back into solid ice. The document outlines the three states of water, the phase changes between each state, and provides examples.
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Ch.12.less.2.what are the properties of sound [autosaved] [recovered]
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Themajorcausesofdeteriorationinstorage
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It's based on the first part of this research paper:
The cost of information acquisition by natural selection
Ryan Seamus McGee, Olivia Kosterlitz, Artem Kaznatcheev, Benjamin Kerr, Carl T. Bergstrom
bioRxiv 2022.07.02.498577; doi: https://doi.org/10.1101/2022.07.02.498577
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InIndia-post-harvestlosses-unscientificstorage,insects,rodents,micro-organismsetc.,accountforabout10percentoftotalfoodgrains
Graininfestation
Directdamage
Indirectly
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Slides from talk:
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https://ashpc.eu/
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With increasing population, people need to rely on packaged food stuffs. Packaging of food materials requires the preservation of food. There are various methods for the treatment of food to preserve them and irradiation treatment of food is one of them. It is the most common and the most harmless method for the food preservation as it does not alter the necessary micronutrients of food materials. Although irradiated food doesn’t cause any harm to the human health but still the quality assessment of food is required to provide consumers with necessary information about the food. ESR spectroscopy is the most sophisticated way to investigate the quality of the food and the free radicals induced during the processing of the food. ESR spin trapping technique is useful for the detection of highly unstable radicals in the food. The antioxidant capability of liquid food and beverages in mainly performed by spin trapping technique.
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Speaker: Diego Blas (IFAE/ICREA)
Title: Gravitational wave detection with orbital motion of Moon and artificial
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Magnet 1
- 1. What are magnets made of? ironiron nickelnickelcobaltcobalt
- 3. What are magnets made of? SteelSteel
- 4. If you want to store a magnet for a long time, what shall you do?
- 5. The keeper preserves the magnetic field
- 6. How do you preserve a bar magnet?
- 7. Directions of the magnetic field
- 8. What happens when a magnet is broken?
- 10. Electromagnet When current moves through a wire, it generates magnetic field. Magnetic field in a single wire is very weak.
- 11. Electromagnet By coiling the wire, magnetic field becomes stronger
- 12. Electromagnet Magnetic field becomes even stronger by placing an iron bar in the center of the coil.
- 13. Electromagnet
- 14. Materials that are attracted towards a magnet Materials that are not attracted towards a magnet magneticmagnetic Non- magnetic Non- magnetic Magnetic and non-magnetic materials
- 16. Magnetic or non-magnetic Cobalt knife magnetic
- 17. Magnetic or non-magnetic Copper coin Non-magnetic
- 18. Magnetic or non-magnetic silver coin Non-magnetic
- 19. Magnetic or non-magnetic Brass key Non-magnetic
- 20. Magnetic or non-magnetic Nickel coin magnetic
- 21. Magnetic or non-magnetic Glass cup Non-magnetic
- 22. Magnetic or non-magnetic gold coin Non-magnetic
- 23. Magnetic or non-magnetic Lead pencil Non-magnetic
- 24. Magnetic or non-magnetic Iron nail magnetic
- 25. Magnetic or non-magnetic Steel spoon magnetic
- 26. Magnetic or non-magnetic Plastic spoon Non-magnetic
- 27. Magnetic or non-magnetic Copper kettle Non-magnetic
- 28. Magnetic or non-magnetic Nickel lighter magnetic
- 29. Magnetic or non-magnetic Wooden chair Non-magnetic